>> reporter: first lady michelle obama arrives here in charlotte today. and last week she told david letterman she hopes americans tune in to the conventions because, rob and paula, she said that's when the campaign begins. >> though she admitted she didn't watch the rnc at all. >> true. >> she knows what they're going to say. >> karen, question for you. obama and biden really burning up the frequent flyer miles during the battleground states. what's on the agenda today? >> they really want to steal back the spotlight. biden in michigan today. a critical state for them. the president in ohio today. he is going there, a state they're paying a lot of attention to. both campaigns are really pouring a lot of resources in. but rob, you will like this one, he will have a little detour, heading down to louisiana later today. he is going to meet with officials there to survey the flood damage and get a briefing on how things are going. chance for him to look presidential, but rob, paula, remember, mitt romney did it last week. he beat him to it when he went down